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The Vault/

Elastic Pulse Button (Bouncy)

Elastic Pulse Button (Bouncy)

Documentation

Webflow

Code

Setup: External Scripts

External Scripts in Webflow

Make sure to always put the External Scripts before the Javascript step of the resource.

In this video you learn where to put these in your Webflow project? Or how to include a paid GSAP Club plugin in your project?

HTML

Copy
<script src="https://cdn.jsdelivr.net/npm/gsap@3.13.0/dist/gsap.min.js"></script>

Step 1: Copy structure to Webflow

Copy structure to Webflow

In the video below we described how you can copy + paste the structure of this resource to your Webflow project.

Copy to Webflow

Webflow structure is not required for this resource.

Step 1: Add HTML

HTML

Copy
<a data-elastic-pulse-btn="" href="#" class="elastic-pulse-btn">
  <div data-elastic-pulse-target="" class="elastic-pulse-btn__content">
    <div class="elastic-pulse-btn__icon">
      <svg xmlns="http://www.w3.org/2000/svg" width="100%" viewbox="0 0 24 24" fill="none"><path d="M20.5 10.5H3.5V21.5H20.5V10.5Z" stroke="currentColor" stroke-width="2"></path><path d="M12 14.5V17" stroke="currentColor" stroke-width="2"></path><path d="M18 10.5V8C18 6.4087 17.3679 4.88258 16.2426 3.75736C15.1174 2.63214 13.5913 2 12 2C10.4087 2 8.88258 2.63214 7.75736 3.75736C6.63214 4.88258 6 6.4087 6 8V10.5" stroke="currentColor" stroke-width="2"></path></svg>
    </div>
    <div class="elastic-pulse-btn__text">
      <span class="elastic-pulse-btn__span">Button with Icon</span>
    </div>
  </div>
</a>

HTML structure is not required for this resource.

Step 2: Add CSS

CSS

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.elastic-pulse-btn {
  cursor: pointer;
  text-decoration: none;
  position: relative;
}

.elastic-pulse-btn__content {
  color: #fff;
  background-color: #ff8a4f;
  border-radius: 50em;
  justify-content: center;
  align-items: center;
  padding: .5em .75em;
  display: flex;
  position: relative;
  box-shadow: inset 0 -.25em .375em 0 #97133433;
}

.elastic-pulse-btn__icon {
  justify-content: center;
  align-items: center;
  width: 1.5em;
  height: 1.5em;
  padding: .25em;
  display: flex;
}

.elastic-pulse-btn__text {
  padding: .25em;
}

.elastic-pulse-btn__span {
  white-space: nowrap;
  font-size: 1em;
  font-weight: 500;
  line-height: 1.2;
  display: block;
}

Step 2: Add custom Javascript

Custom Javascript in Webflow

In this video, Ilja gives you some guidance about using JavaScript in Webflow:

Step 2: Add Javascript

Step 3: Add Javascript

Javascript

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function initElasticPulseButton() {
  // Skip on touch devices
  if (window.matchMedia('(hover: none) and (pointer: coarse)').matches) return;

  document.querySelectorAll('[data-elastic-pulse-btn]').forEach(btn => {
    const target = btn.querySelector('[data-elastic-pulse-target]') || btn;
    let hoverLocked = false;

    btn.addEventListener('mouseenter', () => {
      if (hoverLocked) return;
      hoverLocked = true;
      setTimeout(() => { hoverLocked = false; }, 500);

      const el = target;
      const w = el.offsetWidth;
      const h = el.offsetHeight;
      const fs = parseFloat(getComputedStyle(el).fontSize);
      const stretch = 0.75 * fs;
      const sx = (w + stretch) / w;
      const sy = (h - stretch * 0.33) / h;

      if (el._pulseTl && el._pulseTl.kill) el._pulseTl.kill();
      el._pulseTl = gsap.timeline()
        .to(el, { scaleX: sx, scaleY: sy, duration: 0.1, ease: 'power1.out' })
        .to(el, { scaleX: 1, scaleY: 1, duration: 1, ease: 'elastic.out(1, 0.3)' });
    });
  });
}

// Initialize Elastic Pulse Button (Bouncy)
document.addEventListener('DOMContentLoaded', () => {
  initElasticPulseButton();
});

Step 3: Add custom CSS

Step 2: Add custom CSS

Custom CSS in Webflow

Curious about where to put custom CSS in Webflow? Ilja explains it in the below video:

CSS

Copy

Implementation

Container

Use [data-elastic-pulse-btn] to register the element as a pulse trigger that runs the animation on hover when a pointing device supports hover.

Target

Use [data-elastic-pulse-target] on a child to pulse that child instead of the container, on default the container with [data-elastic-pulse-btn] is pulsed.

Stretch

The pulse deformation is calculated dynamically from the element’s font-size, giving it a proportional bounce that fits both small and large buttons.

To adjust the intensity of the pulse, modify the stretch multiplier in the script:

const stretch = 0.75 * fs;

Lock

A hover lock prevents spam triggering by holding the effect for 500ms after it starts.

Resource Details

Button
Hover
Bounce
Animation

Original source

Dennis Snellenberg

Creator Credits

We always strive to credit creators as accurately as possible. While similar concepts might appear online, we aim to provide proper and respectful attribution.